Safety-valve.



C. F. KRAUT.

SAFETY VALVE.

APPLICATION FILED Aus.29. 9I7.

1,271,726. Patented July 9,1918,

2 SHEETS-SHEET I TEST-IL...

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urn) stratrns Parana rec CHARLES E. KRAUT, OFBALTIMOEE, MARYLAND,ASSIGNOR TO THE KRAUT SAFETY VALVE COMPANY, OF BALTIMORE, MARYLAND, ACORPORATION OF MARYLAND.

SAFETY-VALVE.

Specification of Letters Patent.

Patented July 9, 1918.

Application filed August 29, 1917. Serial No. 188,860.

To all whom it may concern:

Be it known that 1, CHARLES F. KRAUT,

a citizen of the United States, residing at shall exist between theringand its spring? pressed seating member to allow the steam to escape moreeasily, so that the ring will not be unseated an excessive amount, thatsaid ring shall be stiffened against warping or springing from the steampressure, and that the stiffening means shall coact with the externalwebs on said seating member to center the ring without securing it tosaid member. 7

Another object is to so improve upon the structure of the old device, asto confine a larger body of steam close to the valve ring, withoutincreasing the area of the latter upon whichthe steam acts.

Yet another object is to decrease the labor and expense necessary inmanufacturing the patented deviceand in making repairs afterinstallation.

These objects are carried out by the novel features of construction andunique arrangements of partshereinafter fully described In thedrawingsabove briefly described, the numerall has reference tOa valvecasing preferably disposedv vertically and having a steam passage 2threaded at its inlet end for attachment to the boiler. Positionedwithin the outlet end of the passage 2 is a cup-like guide 3 which isheld centered thereinbyradial arms or webs 4 castinteit to take atortuous course.

the patent above referred to.

kgrally with both parts. It will be observed that the guide 3necessarily obstructs a portion of the delivery end of the passage 2, sothat an annular steam discharge space 5 is provided, and in order that alarge volume of steam may be confined adjacent the valve ring 6,withoutincreasing the area of the latter upon which the steam acts, theinlet portion of the space 5 is preferably increased in width asindicated at 7. It is desirable to avoid having obstructions in thesteam discharge space such as would divert the flow of steam from astraight course through said space and impede its escape by causing Tothis end, the inner wall of the passageway 1 is cylindrical, and isreduced in diameter at its upper end to form the outerwall of the steamspace 5.

The valve ring 6 is seated over the annular discharge space 5 and inorder that the steam pressure acting upon the lower side of said ring,may not warp or spring the same between the ribs 8 which hold the ringin seated position, the upper side of said ring is provided with anannular upstanding flange 9 cast integrally therewith.

In addition to the function just set forth for the flange 9, it serves,in connection with the ribs 8, as centering means for the valve ring 6,without securing the latter to the valve seating member 10 as was thecase in As shown clearly in Fig. 1 the ribs in question are carried bythe cylindrical seating member 10, and the outer ends or edges of saidribs abut the inner side of the flange 9 so that horizontal shiftingthereof is prevented. Furthermore, the lower ends of the ribs 8 contactwith the valve ring 6 to force the same against the seat. These numeroususes of the flange 9 and the ribs8, are considered highly importantfeatures of the present invention since j they eliminate additionalmeans which would otherwise be necessary for carrying out the necessaryfunctions.

It Will be 'observedthat' the ring 6 is entirely unsecured in respect tothe valve seat ing' member 10;, and that considerable space existsbetween" said riii'g' and niember so that the steam may easily escapewhen the valve pops. Another change Which has been'ma'djef, istoflaretheinner edge of the ring, 6 as indicated at 11, to even furtherfacilitate the escape of steam between thisring and the spring-pressedseating member 10. r

The outer edge of the valve ring 6,'rather than beingbeveled asindicated in my prior device, is formed with aright 1 angular shoulder12, it having.- been foundthat this construction cooperates to equaladvantage With the' adjusting ring 13, yet that it may be much moreeasily and less expensively manufactured. maybe adjusted and held inadjusted position in any of the Well known Ways Which' form no part ofthe present invention.

' Although highly possible that this feature could Well be eliminated insome types of the valve, the usual mufliing dome 14' is preferablyprovided, the upper end of said dome carrying the adjusting screw 15 forthe valve seating spring .16, the latter being 7 confined within theseating member 10 as usual.

From the foregoing, taken in connection With the accompanying drawings,it Will be obvious that have so improved upon the patented device abovereferred to, as to prevent any possible springing of the valve ring 6between its points of contact with the ribs 8, and that the flange 9hich performs this reinforcing function, also cooperates With the ribsin question in centering the valve ring, Without the necessity ofthreading or otherwise securing said ring to the seating member 10.Thesteam pressure beneath the valve ring always maintains the same incontact With the ribs 8 when the valve is opened by the steam pressureand thus no fastening means for said ring is necessary, other than thefriction existing between the several contacting parts. It Will also beobserved from the foregoing,

that the steam may e'se ape vvith greater case,

trite the rans arent the invention, but I Wish it understoodthat'vvithinthe scope Needless to say, the ring 13' hand.

of the appended claims, numerous minor changes may Well be made;

Iclaiiii Y r 1'. safety valve; casing: having a steam passage and aguide at the delivery end thereof partly obstructing said end to form anannular steam discharge space, a valve riirg seated over and closingsaid space; a valve-seating. member engaged With said guide andpassing-through said ring but in spaced disconnected relationtherewitln'a: spring for actuating?- saidYvalve-seati-ng' member, andco-actin-g, means on said member' and ring for ressing" said ring. toitsseat and centering thering. s

2. In a safety valve, azcasin'gi having a, steam passage and aguide atthe delivery end thereof partly obstructing said end tb form an annularsteam d ischarge' space, a valve-ring seated over and closing said"space, a tubular valve-seating member" en-' gaged' With said guide and";passing through said ring but in spaced disconnectedrela tion therewith,a spring withinr'said member for actuating the same, and coacting meanson said member and ring for pres ng said" ring to its seat andceintering" 1the na 3. In a safety valve, a casing having steam passageand a guideat the delivery end thereof partlypbstriicting said: end toform an annular steam discharge space, a valve-ring seated. over andclosing said space, said ring having an annular stiffening flange on itsupper side, a tubular: valve seating member engaged With sa-id' gardeandpassing through said ring but ins-paced disconnected relation therewith,a spring for actuating said valve seating member, and outstanding Webson said member engaging said flange, to center the valve ring, andadapted to press said'valve'ring wits seat;

4. In. a safety valve, a casing having a steam passage and a guide thedelivery end thereof partly obstructing saidend to form an annular steamdischarge space,- a

valve ring seated over and 'clos-ing said space, said ring havln'g anannular stiffening flange on its 11 per side-,a cylindricalvalveseatingmember engaged with said guide and passing through said ring but inspaced disconnected relation therewith, a spring for actuating saidvalve-s ating member, and 0' tstan ding'Wvebs on said member bearing a'ginst said valve ring toseat' the same and abutting said flange to centersaid ring I r 5. A structure specified in claim 4:, the inner edge ofval ve ring being flared iii the direction of travel of the steam: V

In testiniofiy viiliereof lhavehereunto set CHAR-nits Keane.

Gogie (if this imaitfit may b'bhtaifi'eiizfidi" fivsceats ea-cii; 15addressing the Commissioner 5. p g g I Washington, D. 0." r

